"Those kinds of weapons shouldn't be used in civilian and populated areas... and (we need to) move very quickly to disarm them," Annan said in Jordan, before heading to Syria, the main backer of Hezbollah along with Iran.

Annan echoed criticism of Israeli military tactics by UN humanitarian chief Jan Egeland, who said Israel dropped hundreds of cluster bombs in the final days of the month-long conflict before a ceasefire took effect August 14.

"What's shocking, and I would say completely immoral, is that 90 percent of the cluster bomb strikes occurred in the last 72 hours of the conflict when we knew there would be a resolution, when we knew there would be an end," Egeland said.

As Annan continued his mission, Lebanese Prime Minister Fuad Siniora appealed to international donors gathered in Sweden to do everything they could to help his country rebuild following the devastating Israeli offensive, putting the damage at billions of dollars.

In Israel, Annan had tried but failed to persuade the government of Prime Minister Ehud Olmert to lift its punishing blockade on Lebanon, which remains in place despite the truce, hampering hopes of recovery.

From Jordan, Annan heads to Syria where he will face a regime that has taken a hard line against the UN resolution which ended the 34-day war but whose stance is critical to the success of the ceasefire and the deployment of a beefed-up UN force.

Annan told French radio Thursday Israel had agreed to withdraw from southern Lebanon once 5,000 UN peacekeepers and 16,000 Lebanese troops have been deployed, something he hoped would happen in "a week to 10 days".

However Israeli government spokeswoman Miri Eisen said it was not a matter of numbers but the effectiveness of the force.

Annan also demanded the release of two soldiers whose capture on July 12 sparked Israel's offensive against Hezbollah, and said full implementation of the UN resolution that brokered a ceasefire could lead to a "durable peace".